Lock for demountable rims and tires



R. MONCURE.

LocK ros oEMouNTABLE mms AND mais. l APPLICATION, mso APR. 21. 1921. 1,417,549, A -Patented- May 30, 1922.

2 SHEETS-SHEET l.

- R. MONCURE.

I OCK FR DEMOUNTABLE RIMS AND TIRES.

APPLICATION FILED AFR. 21.. 192I.

Patented May 30,1922. 2 SHEETS-SHEET 2.

ROBINSON ivIoNoURE, or ALEXANDRIA, vrac-INIA. "l

Lock ron nEMcUNrAnIJE anus ANI) Trans.

' Application led .April 21,

To @ZZ 'whom t may concern.' i

Be it known that l, 'ROBINSON MoNcUnn, a citizen of the United States, residing at Alexandria, in the county of Arlington and State of Virginia, 'have invented certain new and useful Improvements in Loeksfor Demountable Rims and Tires, of whichthe following is a specification, reference being had therein to the accompanying drawin s.

Troadly stated the object of the present invention is to provide a quick action-7 lock by means of which a demountable rim and the tire carried thereby may be firmly secured in place upon a wheel with aininimum expenditure of effort upon the part of the person applying the same.

Many important features of-novelty and advantage with respect to the location and mounting of the parts, distribution of load, simplicity and economy in construction and the like, will beset forth in the detail description which follows.

In the accompanying drawings:

Fig. l is a side elevation of a part of wheel having the invention applied thereto;

Fig. 2 is an enlarged viewpartly in side elevation and partly in section-through one of the locking mechanisms;` y

Fig. 3 is a sectional perspective view of a portion of the felloe and one of the locking mechanisms;

Fig. l is an inside plan view of a par of a demountable rim;

Fig. 5 is a transverse vertical sectional View through one of the locking mechanisms withv certain of the parts in elevation;

Fig. 6 is a plan view of one of the cam hereinafter described; and l Fig. 7 is adetail side vie-w of one of the actuating bolts, hereinafter described.

Like numerals designate ycorresponding parts throughout the several figures ,of the drawings. l

Any suitable numbery ofthe locking mechanisms may be employed, though, preferably, six of them are used upon a wheel. Since they are identical in construction, la description of one will serve as a description of all. Each locking mechanism comprises a box like housing 5 having a snug. seating in a recess 6 formed in the felloe 7 of the wheel. The felloe comprises the usual wooden portion Ya and carries the usual circumferential metallic felloe band 7h, said band beine 1921. Serial No. 463,110.

clined and outstanding flange 7C along-,its inneredge, said flange 7@ limiting the in-4 ward movement ofthe demountable rrim' 8 which carries the tire 9 in the usual and well known way. a

This device is also equally applicable to a solid metal felloe.` Y i The demountable-rimS is provided, upon its inner face, with a'plurality of lugs or Specification of Letters Patent. l PgLtQ-td ltgty 30,1922,V y

provided with an inf plates l0, which maybe separatel Vfrom but riveted to the rim or maybe integral with and struckfrom the metal ,of` the rim, `as, desiredv The end walls of the housing 5 are out turned and overlie the band 7b, these outturned portions constituting `abutments ll between which theplates 10 lit. `Thus movement of the rimv and tire about the felloe, circumferentially thereof, iseffectu-` ally prevented. Tf desired,`the` housings- 5 may be secured to the felloel of the wheel by screws l2. The use of screws at this point is not absolutely necessary. If thesehousings are made to Vlit snugly and with a driving fit in the recesses G, theynwill be suffv ficiently securedl inl place without the em ao'y ployment of the screws. f i

The side walls 5c of the housings 4terminate short of the upperrsurfaces of the abutments l1. Tn'other words the upper edges ofthe sidewalls lie substantially flush lwith the upperface of the felloeband 7] and this permits lateral movement of the plate l0 into position* betweeny the vabutli,

ments ll. Bearing recesses-13` areform'edI in the side walls 5 in which hub extensions 14 of cams l5 havetheir bearing.` These cams andhubs have openings lformed through them, which openings are angular in cross section and receive the correspond ing-ly shaped Shanks 17 of'boltshaving angularly formed heads 18.'v These bolts preferably have cylindical portions vv19, which cylindrical portions lie openings 20l formed in the felloe 7. y Q

The cams 15 are so shaped as to eXe'rta' thrustbothv radially and laterally; Togthis end their inner sidesl 15a are disposed at` anv angle to their axes as represented by the Shanks 17 of the bolts, and these inclined inner faces engage the outer ledges offthe plates 10 andexert a cam action` thereagainst to thrust said plates, and conl` sequently the' rim 8,'forcibly inward, when the cams are turned from the dotted line lll) position Fig. 2 to the full line position in said figure. only a partial turn to the bolts by means of a wrench applied to the angular heads 18 thereof and this partial turn not only thrusts the rim inwardly to cause its inner edge 8 to be bound firmly against the flange 7C of the felloe band 7b, but during such partial turning movement of the bolts and cams, the cams are moved to past-center positions. As their elongated nose portions 15b pass over the center the rim is thrust outwardly against the natural resiliency of the rim and against the natural resiliency of the pneumatic tire mounted thereon, and when ythe cam comes to its final position of rest in locking position, as illustrated in full lines in F ig. 2, it is still exerting a radial thrust against the'inner face of the rim. In other words these cams come to their positions of rests abutting against the right hand end of the housings 5 before the tendency of the rim to move inwardly, under its own elasticity and the elasticity of the tire, ceases.

Since the cams, after reaching their positions of rest, are still under tension exerted by the rim, it follows that these cams will be held securely against retrograde movement and accidental unlockingy of the device will be beyond the range of possibility. Additionally, it will be seen that this holding` of thecams under continued tension eifectually prevents them from rattling or making any other objectionable noise, when the wheel is in use. It will be observed that all of the strain upon the cams is exerted through the hubs 14 upon the side walls 5c of the housing. This relieves the bolts of all strain. These bolts do not carry any of the weight but have as their whole duty to impart thel shown in Fig. 7 by using in lieu thereof any suitably shaped tool adapted to engage the an ular openings in the cams.

t is to be understood that the invention is not limited to the precise construction set forth but that it includes within itsl purview whatever changes fairly come within either Thus it is necessar to Give the terms or the spirit of the appended claims.

Having described my invention, what 1v 2. A device of the character described comprising a felloe having a plurality of peripheral recesses formed therein, housings inserted in said recesses, the'end walls of which are provided with outturned portions' which rest upon the outer face ofthe felloe and constitute spaced abutments, a rim, pro- `iections carried by said rim adapted to enter between said abutnieiits and cams mounted for partial rotation in said housings and shaped to exert both a lateral and radial thrust upon the rim when moved to locking position.

3. 1n a rim lock, a housing adapted to be seated in a recess in the outer face of the felly of a wheel and having lugs thereon adapted to rest on the outer face of the felly, recesses in the inner side walls ofthe housing and having bearings at the radially inner ends thereof, a cam having hubs seated in said bearings, the cam and hubs being pro-- vided with an angular opening through which an angular manipulating element may be passed transversely of the wheel.

11. A rim lock of the character described comprising a housing adapted to be inserted in a recess formed in the face of the felloe of a wheel, said housing being insertable from the outer side of said recess and the sidewalls of said housing being recessed, a cam mounted in said housing and having hubs upon its opposite'sideswhich have bearing in the said recesses of the sidewalls of the housing, a rim anda projection upon the rim adapted to he engaged by the side of said cam and against which said camexerts lateral thrust the length of the ca m being such as to cause it to exert a radial thrust upon the rim and the length of the housing being such that the cani abutsl against the end of the housing and comes to a position of rest while still exerting a radial thrust upon the rim.

In' testimony whereof I hereunto affix my signature.

ROBINSON MONCURE. 

